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Floodrisk Management Options

http://www.gw.govt.nz/floodrisk-management-options

Floodrisk Management Options

Updated 17 August 2015 10:44am

As part of developing the Waiwhetu FMP (Floodplain Management Plan) a range of options has been developed that can be used to address the flood hazards. Some of these options are appropriate across the whole catchment, and some are only appropriate to certain areas. These options have now been built into combinations for further analysis.

Options Development

Options development takes place in collaboration with the community, over several stages;

  1. A whole range of options are loosely developed and assessed on how they manage the flood risk
  2. The options are put into packages (normally 4 packages are developed), which when combined manage the flood risk to a target level. Typically 1 in 100 year level.
  3. The packages are developed to a higher level of detail and assesed based on a range of criteria. They are then ranked in order of preference for assesment by committee
  4. The packages are presented to commitee who assess the benefits and flaws of each, and then select one package for implementation. (There is a chance at this stage that the committee rejects all packages and requests development of other packages)
  5. The package of options is re-titled as package of measures.

 

The Waiwhetu Options

The Waiwhetu has been split into 3 areas for development of options.

The three areas are;

  • Upper Waiwhetu - this encompasses Naenae and ends near the Southern end of Waddington Drive. It also includes Naenae hills
  • Mid Waiwhetu - this starts at the Southern end of Waddington Drive and runs all the way to the bridge over the stream at Whites Line East
  • Lower Waiwhetu and Awamutu - this starts at the Whites Line East bridge and runs all the way to the Hutt River, and also includes the whole open air section of the Awamutu stream

The options for each area are available to download;

November 2011 - Updated and modelled options

Please note that the information included in this document is for discussion and development purposes, and all costs, benefits and effects are estimations or approximations. Detailed design will occur during the next stage of the FMP development process.

November 2011 - Modelled Flood Risk Management Options

Superseeded - 18th April 2011 - Updated Options List -

Please note that the information included in this document is for discussion and development purposes, and all costs, benefits and effects are estimations or approximations. Detailed design will occur during a later stage of the FMP development process.

Updated Options List - 18th April 2011

 

Superseeded - Original Options List

In the earlier stages of consultation the follow options packages were presented to the community for discussion and development. These options lists have been replaced by a more recent update.